Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
  • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
  • A61L15/42—Use of materials characterised by their function or physical properties
  • A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
  • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
  • A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic materials
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
  • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
  • A61L15/42—Use of materials characterised by their function or physical properties
  • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
  • A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
  • A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
  • A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
  • A61L2300/21—Acids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
  • A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
  • A61L2300/22—Lipids, fatty acids, e.g. prostaglandins, oils, fats, waxes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
  • A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
  • A61L2300/45—Mixtures of two or more drugs, e.g. synergistic mixtures

Definitions

• the present invention relates to an absorbent article such as a diaper, panty diaper, sanitary napkin or incontinence device comprising an effective odour control system.
• the present invention relates in particular to such absorbent articles wherein an acidic superabsorbent material and an organic zinc salt such a zinc ricinoleate interact synergetically to reduce malodours such as ammonia.
• odourous compounds forming typically after the release of body fluids, especially over a longer period of time.
• These compounds include fatty acids, ammonia, amines, sulphur-containing compounds and ketones and aldehydes. They are present as natural ingredients of body fluids or result from degradation processes of natural ingredients such as urea, which are frequently assisted by microorganisms occurring in the urogenital flora.
• WO 97/46188 , WO 97/46190 , WO 97/46192 , WO 97/46193 , WO 97/46195 and WO 97/46196 teach for instance the incorporation of odour inhibiting additives or deodorants such as zeolites and silica.
• odour inhibiting additives or deodorants such as zeolites and silica.
• the absorption of bodily liquids reduces however the odour inhibiting capacity of zeolites as soon as these become saturated with water, as mentioned for instance in WO 98/17239 .
• a second approach involves the addition of lactobacilli with the intention of inhibiting malodour-forming bacteria in the product.
• lactobacilli and their favourable effect are disclosed for instance in SE 9703669-3 , SE 9502588-8 , WO 92/13577 , SE 9801951-6 and SE 9804390-4 .
• DE 10256569 A1 relates to water-absorbing, crosslinked, acid group-containing polymers in the form of mainly open-cell foam comprising at least one odour control agent selected from compounds with an anhydride group, compounds with an acidic group, cyclodextranes, bactericides and surfactants with an HLB value of less than 12.
• bactericidal compounds are zinc compounds such as zinc chloride.
• the open-cell foams according to DE 10256569 A1 to which the odor control agent may be added do not represent acidic superabsorbers. Moreover, no organic zinc salt is mentioned in this reference.
• US 2004/0180093 A1 relates to a polymer composition including a hydrophilic amine-containing polymer and a bioactive agent selected from silver, copper and zinc compounds.
• the examples given for the zinc compound include various inorganic salts, zinc acetate and zinc lactate.
• This polymer composition is used in medical articles such as wound dressings. Acidic superabsorbers are not mentioned.
• US 2004/0024374 A1 is in the name of the present applicant and relates to an absorbent article having a skincare composition applied on at least one portion thereof.
• One among many examples of skincare substances is zinc ricinoleate.
• the highly absorbent polymers (SAPs) mentioned in this document are not further specified.
• DE 199 29 106 A1 pertains to a diaper comprising an absorbent body and an absorbing agent associated therewith characterized in that this adsorbing agent is capable of adsorbing ammonia. According to the teaching of this document, this may be achieved by using partially neutralized (acidic) SAPs based on polyacrylic acids. According to one embodiment, active carbon impregnated with zinc salts can also be present. Organic zinc salts are not mentioned in this document.
• organic zinc salts of unsaturated hydroxylated fatty acids such as zinc ricinoleate are deodorizing active ingredients (see for instance DE 1792074 A1 , DE 2548344 A1 and DE 3808114 A1 ).
• the present invention relates to an absorbent article, such as a diaper, panty diaper, panty liner, sanitary napkin or incontinence device comprising a liquid-permeable topsheet, a liquid-impermeable backsheet and an absorbent core enclosed between said liquid-permeable topsheet and said liquid-impermeable backsheet, wherein said absorbent core comprises a superabsorbent material, characterized in that said superabsorbent material is an acidic superabsorbent material having a pH value of 5.5 or less and the absorbent core additionally comprises an organic zinc salt.
• acidic superabsorbent material having a pH value of 5.5 or less is oftentimes simply referred to as acidic superabsorbent material (SAP).
• the present inventors have found that acidic superabsorbent material and organic zinc salt, such as zinc ricinoleate interact synergetically in the suppression of unpleasant odours and completed the present invention based on this finding.
• absorbent article we understand articles capable of absorbing body fluids such as urine, watery feces, female secretion or menstrual fluids. These absorbent articles include, but are not limited to diapers, panty diapers, panty liners, sanitary napkins or incontinence device (as used for instance for adults).
• Such absorbent articles have a liquid-pervious topsheet, which during use is facing the wearer's body. They further comprise a liquid-impervious backsheet, for instance a plastic film, a plastic-coated nonwoven or a hydrophobic nonwoven and an absorbent core enclosed between the liquid-pervious topsheet and the liquid-impervious backsheet.
• a liquid-impervious backsheet for instance a plastic film, a plastic-coated nonwoven or a hydrophobic nonwoven and an absorbent core enclosed between the liquid-pervious topsheet and the liquid-impervious backsheet.
• a suitable topsheet may be manufactured from a wide range of materials such as woven and nonwoven materials (e.g. a nonwoven web of fibers), polymeric materials such as apertured plastic films, e.g. apertured formed thermoplastic films and hydroformed thermpoplastic films; porous foams; reticulated foams; reticulated thermoplastic films; and thermoplastic scrims.
• Suitable woven and nonwoven materials can be comprised of natural fibers (e.g. wood or cotton fibers), synthetic fibers (e.g. polymeric fibers such as polyesters, polypropylene or polyethylene fibers) or from a combination of natural and synthetic fibers.
• the topsheet comprises a nonwoven web
• the web may be manufactured by a wide number of known techniques.
• the web may be spun-bonded, carded, wet-laid, melt-blown, hydroentangled, combinations of the above or the like.
• apertured plastic films e.g. thermoplastic films
• nonwoven materials based on synthetic fibers e.g. those made from polyethylene or polypropylene homo- or copolymers and polymer compositions based thereon.
• At least one further layer exists between the absorbent core and the topsheet and may be made from hydrophobic and hydrophilic web or foam materials.
• web material we understand coherent flat fiber-based structures of paper tissue, woven or nonwoven type. The nonwoven material may have the same features as described above for topsheets.
• the at least one further layer may contribute to fluid management, for instance in the form of at least one acquisition/ distribution layer.
• Such structures are taught for instance by US 5,558,655 , EP 0 640 330 A1 , EP 0 631 768 A1 or WO 95/01147 .
• “Foam materials” are also well known in the art and for instance describe in EP 0 878 481 A1 or EP 1 217 978 A1 in the name of the present applicant.
• the absorbent core which may be partially or totally surrounded by a core wrap, comprises an acidic superabsorbent material, optionally in admixture with any other absorbent material that is generally compressible, conformable, nonirritating to the wearer's skin and capable of absorbing and retaining liquids such as urine and other body exudates.
• absorbent materials include a wide variety of liquid-absorbent materials commonly used in disposable diapers and other absorbent articles such as comminuted wood pulp, which is generally referred to as air felt or fluff, as well as creped cellulose wadding; melt blown polymers, including co-form; chemically stiffened, modified or crosslinked cellulosic fibers; tissue, including tissue wraps and tissue laminates, absorbent foams, absorbent sponges, non-acidic superabsorbent polymers (such as superabsorbent fibers), absorbent gelling materials, or any other known absorbent materials or combinations of materials.
• liquid-absorbent materials commonly used in disposable diapers and other absorbent articles
• other absorbent articles such as comminuted wood pulp, which is generally referred to as air felt or fluff, as well as creped cellulose wadding
• melt blown polymers including co-form
• chemically stiffened, modified or crosslinked cellulosic fibers tissue, including tissue wraps and tissue laminates, absorbent foams, absorbent
• the term "superabsorbent material” is well known in the art and designates water-swellable, water-insoluble materials capable of absorbing the multiple of their own weight in body fluids.
• the superabsorbent material is capable of absorbing at least about 10 times its weight, preferably at least about 15 times its weight, in particular at least about 20 times its weight in an aqueous solution containing 0.9 wt.-% of sodium chloride (under usual measuring conditions where the superabsorbent surface is freely accessible to the liquid to be absorbed).
• the standard test EDANA WSP 241.2 can be used.
• the superabsorbent material may be in any form suitable for use in absorbent articles including particles, fibers, flakes, spheres and the like, the particle form being preferred.
• Acidic SAPs are based on homo- or copolymers comprising at least one polymerizable unit having an acidic group (e.g. a carboxylic acid group or a sulfonic acid group) such as methacrylic acid, acrylic acid, maleic acid, vinylsulfonic acid.
• the corresponding polymers include, but are not limited to poly(meth)acrylic acids, ethylene maleic anhydride copolymers, polymers and copolymers of vinylsulfonic acids, polyacrylates, acrylic acid grafted starch and isobutylene maleic anhydride copolymers. These polymers are preferably crosslinked to render the materials substantially water insoluble.
• the superabsorbent material is a crosslinked homo- or copolymer comprising (meth)acrylic acid units, for instance of the type disclosed in EP 0 391 108 A2 .
• the acidic superabsorber has preferably a pH value of 3.0 to 5.5, more preferably 3.5 to 5.3 and most preferably 4.1 to 5.2. Thereby, the pH is measured using the standard test EDANA WSP 200.2.
• the acidic SAPs to be used in the present invention have a pH of 5.5 or less, with the preferred ranges as defined in the preceding paragraph.
• acidic SAP there are two ways of manufacturing acidic SAP.
• One way is to add an acid, e.g. citric acid, to a standard SAP, thereby reducing the pH.
• the other method is to maintain a low degree of neutralisation.
• a standard SAP has a high percentage (typically at least 70%) of the acidic groups neutralised under formation of alkali metal salts.
• acidic SAPs manufactured according to this method have a lower degree of neutralisation, typically 15 to 60%. The degree of neutralisation and pH strongly correlate which implies that the acidity of the SAP can be controlled by the degree of neutralisation.
• the absorbent core comprising the acidic superabsorbent has a pH value of 3.0 to 5.7, more preferably 3.5 to 5.5, in particular 4.1 to 5.4 after wetting with synthetic urine.
• the pH of the absorbent core can be measured very precisely with the following method involving the preparation of a test absorbent core and pH measurement using the same.
• Absorbent cores were punched out of an absorbent core produced in a pilot plant. A standard method of mat forming a core was used in the production of the core in the pilot plant.
• the absorbent core consisted of a homogenous mixture of fluffed pulp and superabsorbent material. The absorbent core was compressed to a bulk of about 8-10 cm 3 /g. The size of the punched cores was 5 cm in diameter, the weight of the same about 1.2 g.
• An absorbent core having a diameter of approximately 50 mm was prepared according to Method 1.
• a predetermined amount of Test liquid 1 was added, 16 ml to all samples, whereafter the absorbent core was left to swell for 30 minutes. Thereafter, pH was measured on the liquid squeezed out of the samples using a surface electrode, Flat-bottomed, type Single Pore Flat, Hamilton.
• Test liquid 1 (referred to in Method 2):
• the test liquid to be used is 16 ml synthetic urine (as defined above) for a single core absorbent body.
• the absorbent core preferably comprises at least one layer comprising a mixture of fibers and acidic superabsorbent material, organic zinc salt and optionally non-acidic superabsorbent material.
• Non-acidic superabsorbent material also designated in the present specification as standard superabsorbent material
• superabsorbent materials of the above described type showing a pH of e.g 5.8 or more.
• Non-acidic SAPs comprising polymerizable units with acidic groups preferably have a neutralization degree of at least 70%.
• the fibers present in the absorbent core are preferably also capable of absorbing body liquid as is the case for hydrophilic fibers.
• the fibers are cellulosic fibers such as woodpulp fluff, cotton, cotton linters, rayon, cellulose acetate and the like, the use of cellulosic fluff pulp being preferred.
• the cellulosic fluff pulp can be of mechanical or chemical type, the chemical pulp being preferred.
• the total amount of superabsorbent material is preferably 10 to 70 wt.-%, more preferably 20 to 65 wt.-%, in particular 30 to 60 wt.-%, for instance 30 to 50 wt.-%, based on the weight of the entire mixture of fibers and superabsorbent materials (without organic zinc salt).
• weight ratio of acidic SAP/non-acidic SAP is not particularly restricted (e.g. 5/95 to 95/5, 10/90 to 90/10, 20/80 to 80/20), even though it would appear that higher amounts of acidic SAP seem to enhance the effect of the present invention. Accordingly, weight ratios of acidic SAP/non-acidic SAP of 100/0 to 50/50 (e.g. 95/5 to 60/40, 90/10 to 70/30) can be preferably selected depending on the properties to be achieved.
• organic zinc salts cooperate already with acidic SAP in a very efficient odour control.
• a preferred lower weight limit of organic zinc salt (calculated as zinc) seems to be at least 10 -5 g per g dry acidic SAP.
• dry used in relation to acidic SAP is to be understood such that no water has been added to the acidic SAP and that the only water present in the acidic SAP is the unavoidable residual water from manufacturing.
• the organic zinc salt is present in amounts of at least 10 -4 g, even more preferably at least 5 x 10 -4 g, even more preferably at least 10 -3 g.
• the amount of the zinc salt is at least 10 -2 g zinc per g dry acidic SAP.
• the concentration of the organic zinc salt may be in the range of 0.03 to 30 weight percent.
• organic zinc salt there are also no specific restrictions regarding the organic zinc salt to be used.
• zinc salts of organic carboxylic acids having 2 to 30 carbon atoms, in particular 12 to 24 carbon atoms are preferably used.
• the carboxylic acid group may be attached to aliphatic, aliphatic-aromatic, aromatic-aliphatic, alicyclic, or aromatic residues, wherein the aliphatic chain or the alicyclic ring(s) may be unsaturated and are optionally substituted, for instance by hydroxy or C1 to C4 alkyl.
• These salts include zinc acetate, zinc lactate, zinc ricinoleate and zinc abietate.
• the zinc salt is the zinc salt of an unsaturated hydroxylated fatty acid having 8 to 18 carbon atoms.
• unsaturated hydroxylated fatty acid having 8 to 18 carbon atoms.
• the most preferred embodiment is zinc ricinoleate.
• the above-described organic zinc salt such as zinc ricinoleate is activated by an amino acid as in the commercially available TEGO ® Sorb A30 (Degussa).
• the organic zinc salt to be used in the present invention may also be capable of removing malodorous substances chemically based on amines, e . g ., nicotine in cigarette smoke, thiocompounds, e . g ., allicin in garlic and onions, and acids, e . g ., isovaleric acid in human sweat, and butyric acid.
• amines e . g ., nicotine in cigarette smoke
• thiocompounds e . g ., allicin in garlic and onions
• acids e . g ., isovaleric acid in human sweat
• butyric acid e. ricinoleate which is, e . g ., marketed by Degussa under the tradename TEGO ® Sorb has the described additional odor removing effect apart from removing ammonia.
• the present invention is also not subject to any limitations regarding the technique of incorporating the organic zinc salt into the absorbent core. Dipping and spraying are preferred.
• the fibers present in the absorbent core preferably cellulosic fluff pulp with a solution of the organic zinc salt prior to or during admixture with the acidic SAP.
• a solution of the organic zinc salt is sprayed onto the fibers, most preferably onto the cellulosic fluff pulp sheets as obtained from the manufacturer.
• the organic zinc salt solution can be sprayed onto the fluff pulp sheet directly by the manufacturer of these sheets prior to the delivery of the sheets to the manufacturer of the absorbent articles. This is an especially preferred embodiment since it avoids the extra step of spraying the organic zinc salt solution when manufacturing the absorbent article.
• the fibers are dipped into the solution. The acidic SAP is then added during or after core formation.
• a core is formed by means of conventional techniques from the fibers, preferably cellulosic fluff, said core being sprayed during core formation with the zinc salt solution.
• the acidic SAP is incorporated either during or after core formation, though spraying the already formed absorbent core is less preferred.
• the solution of the organic zinc salt, in particular zinc ricinoleate is sprayed on one or both sides of the absorbent core, or one of both sides of the individual layers constituting the same.
• the solvent used for this solution can be water, a preferably volatile organic solvent such as ethanol or a mixture of water and a water-miscible organic solvent such as ethanol.
• the organic zinc solvent is present in the solution in a relatively high concentration, preferably 1 to 30 wt.-%.
• concentration preferably 1 to 30 wt.-%.
• Commercially available solutions of organic zinc salts such as TEGO ® Sorb A30 available from Degussa (content of actives 30 weight%, zinc ricinoleate activated by an amino acid) can also be employed.
• the backsheet prevents the exudates absorbed by the absorbent layer and containing with the article from soiling other external articles that may contact the absorbent article, such as bed sheets and undergarments.
• the backsheet is substantially impervious to liquids (e.g., urine) and comprises a laminate of a nonwoven and a thin plastic film such as a thermoplastic film having a thickness of about 0.012 mm to about 0.051 mm.
• Suitable backsheet films include those manufactured by Tredegar Industries Inc. of Terre Haute, Ind. and sold under the trade names X15306, X10962, and X10964.
• Suitable backsheet materials may include breathable materials that permit vapors to escape from the absorbent article while still preventing exudates from passing through the backsheet.
• exemplary breathable materials may include materials such as woven webs, nonwoven webs, composite materials such as film-coated nonwoven webs, and microporous films.
• Circular test absorbent cores having a weight of about 1,2 g and a diameter of 5 cm were punched out of an absorbent core produced in a pilot plant.
• a standard method of mat forming a core was used in the production of the core in the pilot plant.
• the absorbent core consisted of a homogenous mixture of fluff pulp and superabsorbent material.
• the fluff pulp used was 0.72 g Weyerhauser pulp (NB 416) and the superabsorbent material was 0.48 g of an acidic superabsorber (pH 5.1) named Z3106 from Degussa.
• the absorbent core was compressed to a bulk of about 8-10 cm 3 /g.
• Absorbent cores were prepared in accordance with Method 1.
• Test liquid 2 was prepared. Bacteria suspension of Proteus mirabilis was cultivated in nutrient broth 30°C overnight. The graft cultures were diluted and the bacterial count was determined. The final culture contained approximately 10 5 organisms per ml of test liquid.
• the absorbent core was placed in a plastic jar and the Test liquid 2 was added to the absorbent core, whereafter the container was incubated at 35°C for 4, 6, and 8 hours respectively, whereafter samples were taken from the containers using a hand pump and a so called Dräger-tube. The ammonia content was obtained as a colour change on a scale graded in ppm or volume percent.
• the synthetic urine contains mono- and divalent cations and anions and urea and has been prepared in accordance with the information in Geigy, Scientific Tables, Vol 2, 8th ed. 1981 p. 53 .
• the growth medium for the micro-organisms is based on information of Hook- and FSA-media for entero-bacteria.
• the pH in this mixture is 6.6.
• An absorbent core was formed in the same manner as in Example 1 with the sole exception that the aqueous solution added to the absorbent core, either by dripping the solution onto the surface (on one side) or dipping one side of the core into the solution, contained 6 wt.-% of zinc ricinoleate.
• An absorbent core was formed in the same manner as in Example 1 with the sole exception that the aqueous solution added to the absorbent core, either by dripping the solution on to the surface (on one side) or dipping one side of the core into the solution, contained 0.5 wt.-% of zinc ricinoleate.
• An absorbent core was formed in the same manner as in Example 1 with the sole exception that the aqueous solution added to the absorbent core, either by dripping the solution on to the surface (on one side) or dipping one side of the core into the solution, contained 0.3 wt.-% of zinc ricinoleate.
• An absorbent body was formed in the same manner as in example 1 with the sole exception that the acidic superabsorber was substituted for a conventional non-acidic superabsorber ( XZS 91030.03 available from Dow Chemicals). Moreover, no treatment with zinc ricinoleate was carried out.
• An absorbent core was formed in the same manner as in Example 1, with the sole exception that the acidic superabsorber was replaced by a non acidic type (Dow XZS 91030.03, available from Dow chemicals).
• An absorbent body was formed in the same manner as in Example 1 with the sole difference that a treatment with a solution of zinc ricinoleate was not carried out.
• An absorbent core was formed in the same manner as in Example 5 with the sole exception that no zinc ricinoleate was added thereto.

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• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Epidemiology (AREA)
• Hematology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Dispersion Chemistry (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

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• 2005
  • 2005-11-18 WO PCT/EP2005/012395 patent/WO2007057043A1/en active Application Filing
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